Monitoring diversity and abundance of mammals with camera traps: a case study on Mount Tsukuba, central Japan

Yasuda, Masatoshi

doi:10.3106/mammalstudy.29.37

Cited by 103 publications

(83 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Despite the set of factors influencing the detection probability of species (e.g., Yasuda 2004, Larrucea et al 2007, Guil et al 2010, Harmsen et al 2010, there is a growing demand for the use of camera traps as a tool for estimating population parameters or monitoring the population tendencies of threatened species. When the same http://www.biotaneotropica.org.br http://www.biotaneotropica.org.br/v13n2/en/abstract?article+bn02013022013…”

Section: Discussionmentioning

confidence: 99%

“…The detection of mammals may vary depending on the animal's sex, age, social status (alpha or beta and resident or transient) and territoriality (Larrucea et al 2007), the distribution of reproductive females, the local abundance of prey (Guil et al 2010), intraspecific and interspecific interactions (Harmsen et al 2010), human pressure and the physical environment (Guil et al 2010). Furthermore, the seasonality of the species can change the intensity with which a given species is recorded (Yasuda 2004), and the capture rate is influenced by the temporal and seasonal activity patterns of the species (Larrucea et al 2007). Differences in detectability among species also can be caused by relatively subtle differences in behavior (Harmsen et al 2010).…”

Section: Introductionmentioning

confidence: 99%

“…the use of camera-trap records as surrogates for abundance and population density of species whose individuals cannot be identified (Carbone et al 2001, Jennelle et al 2002, Yasuda 2004, Larrucea et al 2007, Srbek-Araujo & Chiarello 2007, Rowcliffe et al 2008, Rovero & Marshall 2009, Harmsen et al 2010. Despite these limitations and recommendations, the index of relative abundance, without calibration, obtained from the rate or frequency of capture has been widely used in camera-trap studies (e.g., Jácomo et al 2004, O'Brien et al 2003, Silveira et al 2003, Trolle & Kéry 2005, Weckel et al 2006, Kasper et al 2007, Rowcliffe et al 2008, Rovero & Marshall 2009, without consideration of the variations in species capture probability (Gu & Swihart 2004).…”

mentioning

confidence: 99%

See 2 more Smart Citations

Influence of camera-trap sampling design on mammal species capture rates and community structures in southeastern Brazil

Srbek‐Araujo

Chiarello

2013

Biota Neotrop.

View full text Add to dashboard Cite

The distribution of species and population attributes are critical data for biodiversity conservation. As a tool for obtaining such data, camera traps have become increasingly common throughout the world. However, there are disagreements on how camera-trap records should be used due to imperfect species detectability and limitations regarding the use of capture rates as surrogates for abundance. We evaluated variations in the capture rates and community structures of mammals in camera-trap surveys using four different sampling designs. The camera traps were installed on internal roads (in the first and fourth years of the study), at 100-200 m from roads (internal edges; second year) and at 500 m from the nearest internal road (forest interior; third year). The mammal communities sampled in the internal edges and forest interior were similar to each other but differed significantly from those sampled on the roads. Furthermore, for most species, the number of records and the capture success varied widely among the four sampling designs. A further experiment showed that camera traps placed on the same tree trunk but facing in opposing directions also recorded few species in common. Our results demonstrated that presence or non-detection and capture rates vary among the different sampling designs. These differences resulted mostly from the habitat use and behavioral attributes of species in association with differences in sampling surveys, which resulted in differential detectability. We also recorded variations in the distribution of records per sampling point and at the same spot, evidencing the stochasticity associated with the camera-trap location and orientation. These findings reinforce that for species whose specimens cannot be individually identified, the capture rates should be best used as inputs for presence and detection analyses and for behavior inferences (regarding the preferential use of habitats and activity patterns, for example). Comparisons between capture rates or among relative abundance indices, even for the same species, should be made cautiously.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Influence of camera-trap sampling design on mammal species capture rates and community structures in southeastern Brazil

Srbek‐Araujo

Chiarello

2013

Biota Neotrop.

View full text Add to dashboard Cite

show abstract

“…La estimación de la abundancia para el caso de mamíferos tanto medianos como grandes es difícil y costosa debido a sus hábitos nocturnos y evasivos además por lo general, se encuentran en bajas densidades, por lo anterior es recomendable el cálculo de índices de abundancia relativa (Sutherland 1996). Los índices obtenidos son el resultado del muestreo de una fracción de la población y se expresan como el número de individuos contados por unidad de muestreo , O'Brien et al 2003, Yasuda 2004, Rovero & Marshall 2009). …”

unclassified

“…La frecuencia de captura ha sido utilizada como un índice de abundancia relativa (IAR) evidenciando su correlación con las densidades absolutas, además de su relativa facilidad de aplicación , O'Brien et al 2003, Silveira et al 2003, De Almeida et al 2004, Yasuda 2004, Kelly 2008, Monroy-Vilchis et al 2009, Rovero & Marshall 2009). De esta manera los objetivos del presente estudio fueron evaluar la abundancia relativa y el patrón de actividad de los mamíferos medianos y grandes de la Reserva Natural Sierra Nanchititla.…”

unclassified

Fototrampeo de mamíferos en la Sierra Nanchititla, México: abundancia relativa y patrón de actividad

Monroy‐Vilchis¹,

Zarco‐González²,

Rodríguez‐Soto³

et al. 2010

RBT

View full text Add to dashboard Cite

Mammals' camera-trapping in Sierra Nanchititla, Mexico: relative abundance and activity patterns. Species conservation and their management depend on the availability of their population behavior and changes in time. This way, population studies include aspects such as species abundance and activity pattern, among others, with the advantage that nowadays new technologies can be applied, in addition to common methods. In this study, we used camera-traps to obtain the index of relative abundance and to establish activity pattern of medium and large mammals in Sierra Nanchititla, Mexico. The study was conducted from December 2003 to May 2006, with a total sampling effort of 4 305 trap-days. We obtained 897 photographs of 19 different species. Nasua narica, Sylvilagus floridanus and Urocyon cinereoargenteus were the most abundant, in agreement with the relative abundance index (RAI, number of independent records/100 trap-days), and according to previous studies with indirect methods in the area. The activity patterns of the species showed that 67% of them are nocturnal, except Odocoileus virginianus, Nasua narica and others. Some species showed differences with previously reported patterns, which are related with seasonality, resources availability, organism sex, principally. The applied method contributed with reliable data about relative abundance and activity patterns. Rev. Biol. Trop. 59 (1): 373-383. Epub 2011 March 01.

show abstract

Camera traps and mark‐resight models: The value of ancillary data for evaluating assumptions

Parsons

Simons

Pollock³

et al. 2015

J Wildl Manag

View full text Add to dashboard Cite

Unbiased estimators of abundance and density are fundamental to the study of animal ecology and critical for making sound management decisions. Capture-recapture models are generally considered the most robust approach for estimating these parameters but rely on a number of assumptions that are often violated but rarely validated. Mark-resight models, a form of capture-recapture, are well suited for use with noninvasive sampling methods and allow for a number of assumptions to be relaxed. We used ancillary data from continuous video and radio telemetry to evaluate the assumptions of mark-resight models for abundance estimation on a barrier island raccoon (Procyon lotor) population using camera traps. Our island study site was geographically closed, allowing us to estimate real survival and in situ recruitment in addition to population size. We found several sources of bias due to heterogeneity of capture probabilities in our study, including camera placement, animal movement, island physiography, and animal behavior. Almost all sources of heterogeneity could be accounted for using the sophisticated mark-resight models developed by McClintock et al. (2009b) and this model generated estimates similar to a spatially explicit mark-resight model previously developed for this population during our study. Spatially explicit capture-recapture models have become an important tool in ecology and confer a number of advantages; however, non-spatial models that account for inherent individual heterogeneity may perform nearly as well, especially where immigration and emigration are limited. Non-spatial models are computationally less demanding, do not make implicit assumptions related to the isotropy of home ranges, and can provide insights with respect to the biological traits of the local population. Ó 2015 The Wildlife Society.

show abstract

Monitoring diversity and abundance of mammals with camera traps: a case study on Mount Tsukuba, central Japan

Cited by 103 publications

References 11 publications

Influence of camera-trap sampling design on mammal species capture rates and community structures in southeastern Brazil

Influence of camera-trap sampling design on mammal species capture rates and community structures in southeastern Brazil

Fototrampeo de mamíferos en la Sierra Nanchititla, México: abundancia relativa y patrón de actividad

Camera traps and mark‐resight models: The value of ancillary data for evaluating assumptions

Contact Info

Product

Resources

About